CN217614018U

CN217614018U - Membrane system device capable of being operated in bidirectional cross flow mode

Info

Publication number: CN217614018U
Application number: CN202123456287.3U
Authority: CN
Inventors: 王怀革
Original assignee: Suzhou Kesuo Membrane Technology Co ltd
Current assignee: Suzhou Kesuo Membrane Technology Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-10-21
Anticipated expiration: 2031-12-31

Abstract

The utility model discloses a membrane system device capable of being operated in a bidirectional cross flow manner. The technical scheme of the utility model is that: the valve component is including parallelly connected first tee bend ball valve and the tee bend ball valve of second that sets up, first tee bend ball valve includes first normal opening, first opening and second opening, second tee bend ball valve includes second normal opening, third opening and fourth opening, it advances the membrane pipeline to connect the raw water between second opening and the fourth opening, connect dense water outlet pipe way between first opening and the third opening, still including dense water return line, the membrane module includes a plurality of filter membrane unit, the filter membrane unit includes membrane unit and membrane shell, the membrane unit includes that the water pipe is produced at the center and the winding is rolled up the layer at the water pipe is produced at the center, it includes the diaphragm to roll up the membrane layer, produce water net cloth and dense water cloth, form parallel dense water cloth through setting up a plurality of parallel lattice structures on the dense water cloth. The membrane separation device capable of bidirectional cross flow provided by the utility model can change the pollutant in the membrane element along with the water flow and carry away the pollutant in the membrane element at any time.

Description

Membrane system device capable of being operated in bidirectional cross flow mode

Technical Field

The utility model relates to the technical field of water treatment facilities, in particular to membrane system device that can two-way cross-flow operation.

Background

The membrane separation technology is a new technology which takes a separation membrane as a core and is used for separating, concentrating and purifying substances. The technology is a separation method using semipermeable membrane, because the membrane separation operation is generally carried out at normal temperature, the separated substance can keep the original property, the original color, fragrance, taste, nutrition and taste of the food can be kept, and the activity of the functional components can be kept. The method has the advantages of strong selectivity, simple operation process, wide application range and low energy consumption, so the method can be widely applied to the production of food.

The basic process principle of membrane separation is relatively simple. In the process of filtration, the feed liquid is pressurized by a pump, the feed liquid flows through the surface of the filter membrane at a certain flow speed, substance molecules with molecular weight larger than the molecular weight intercepted by the membrane do not permeate the membrane and flow back to the charging tank, and substances or molecules with molecular weight smaller than the molecular weight intercepted by the membrane permeate the membrane to form dialysate. Therefore, the membrane system has two outlets, namely a reflux liquid (concentrated liquid) outlet and a dialysate outlet. Per unit membrane area (m) per unit time (Hr) ² ) The amount of dialysate flow (L) is called membrane flux (LMH), i.e. filtration rate. Factors that influence membrane flux are: temperature, pressure, solids content (TDS), ionic concentration, viscosity, and the like.

In the existing roll-type membrane system, a membrane module unit generally comprises a running block module and a cleaning module, and the running and cleaning modules of the membrane in the mature roll-type membrane separation system are in a water flow one-way passing mode, so that the fault tolerance of the membrane system is very low due to different water sources, and the requirement on a pretreatment unit is higher. The sewage blockage rate of the membrane system unit can be increased by high-difficulty wastewater, and the following defects in the prior art are summarized: 1. The membrane element has higher requirement on the quality of inlet water; 2. the fault tolerance of the membrane element and the system is too low; 3. the membrane element replacement frequency is high; 4. the system stability is poor.

SUMMERY OF THE UTILITY MODEL

The main object of the present invention is to provide a membrane system device which can be operated in a bidirectional cross-flow manner and can take contaminants away from a membrane element according to the change of the water flow direction in the membrane element.

In order to achieve the above purpose, the utility model provides a following technical scheme: a membrane system device capable of being operated in a bidirectional cross-flow mode comprises a raw water pump, a high-pressure pump, a circulating pump, a valve assembly and a membrane assembly, wherein the raw water pump and the circulating pump are arranged on a membrane system membrane inlet pipeline, the valve assembly comprises a first three-way ball valve and a second three-way ball valve which are arranged in parallel, the first three-way ball valve comprises a first normal opening, a first opening and a second opening, the second three-way ball valve comprises a second normal opening, a third opening and a fourth opening, a raw water inlet pipeline is connected between the second opening and the fourth opening, a concentrated water outlet pipeline is connected between the first opening and the third opening, the membrane system membrane inlet pipeline is connected to the raw water inlet pipeline between the second opening and the fourth opening, the membrane system device further comprises a concentrated water return pipeline, one end of the concentrated water return pipeline is connected to a concentrated water outlet pipeline between the first opening and the third opening, the other end of the concentrated water return pipeline is connected to the membrane system membrane inlet pipeline between the high-pressure pump and the circulating pump, a raw water inlet pipeline and a concentrated water outlet pipeline are respectively arranged at two ends of the membrane assembly, the raw water inlet pipeline is connected to the first normal opening, one side of the first normal opening, the concentrated water outlet pipeline is connected to the second normal water outlet pipeline, and one side of the membrane assembly, and one side of the concentrated water outlet pipeline is connected to the concentrated water outlet pipeline; the membrane module includes a plurality of filter membrane unit, the filter membrane unit includes membrane unit and membrane shell, the membrane unit includes that the center produces the water pipe and twines the membrane roll layer on the water pipe is produced at the center, the membrane roll layer includes the diaphragm, produces water net check cloth and dense water cloth, form parallel dense water cloth through setting up a plurality of parallel lattice constructions on the dense water cloth, membrane roll layer outside is provided with net wrap layer, the both ends that the water pipe was produced at the center set up the end cover respectively, the external diameter of end cover is the same with net wrap layer's external diameter.

Preferably, the raw water pump is arranged in a main mode and a standby mode.

Preferably, a concentrate discharge valve and a concentrate pressure gauge are arranged on the concentrate return pipeline.

Preferably, the raw water inlet pipeline is provided with a water inlet pressure gauge.

The utility model has the following advantage for prior art, this scheme is after the theory of operation of system in the system design endomembrane system has realized above-mentioned scheme, and equipment in use can change membrane system water flow direction according to real-time equipment parameter, and the untimely pollutant in with the membrane element in time takes the system out, and the dirty stifled risk of greatly reduced system has reduced the cleaning frequency of membrane system, has increased life cycle, greatly reduced volume use cost. The advantages include reduced system design limitation, improved membrane system utilization rate, energy saving, emission reduction, high efficiency and reduced cost. The membrane separation device capable of realizing bidirectional cross flow can carry away pollutants in the membrane element along with the change of water flow, thereby greatly reducing the chemical cleaning frequency of the membrane element and reducing the operation cost. The membrane separation device capable of realizing bidirectional cross flow has higher system fault tolerance under different water quality conditions. And the system design process is simplified. The membrane separation device capable of realizing bidirectional cross flow ensures that the system runs more stably and more efficiently.

Drawings

FIG. 1 is a schematic diagram of a system structure of a membrane system apparatus capable of bidirectional cross-flow operation according to the present invention;

FIG. 2 is a schematic diagram of a membrane unit structure of a membrane system apparatus capable of bidirectional cross-flow operation according to the present invention;

fig. 3 is a schematic structural view of the parallel dense water cloth of the present invention which is arranged in parallel net shape.

In the figure: 1. a raw water pump; 2. a circulation pump; 3. a valve assembly; 4. a membrane module; 5. a membrane system is provided with a membrane inlet pipeline; 6. a first three-way ball valve; 7. a second three-way ball valve; 8. a first normal opening; 9. a first opening; 10. a second opening; 11. a second normal opening; 12. a third opening; 13. a fourth opening; 14. a raw water inlet pipeline; 15. a concentrated water outlet pipeline; 16. a concentrated water return line; 17. raw water enters a pipeline; 18. The produced water flows out of the pipeline; 19. a concentrated water pipeline; 20. a high pressure pump; 21. a central water producing pipe; 22. a film roll layer; 23. parallel dense water cloth; 24. a mesh layer; 25. an end cap; 26. and (4) a membrane shell.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1, a two-way cross-flow membrane separation combined valve device based on a three-way ball valve comprises a raw water pump 1, a high-pressure pump 20, a circulating pump 2, a valve assembly 3 and a membrane assembly 4, wherein the raw water pump 1 and the circulating pump 2 are arranged on a membrane system inlet pipeline 5, the valve assembly 3 comprises a first three-way ball valve 6 and a second three-way ball valve 7 which are arranged in parallel, the first three-way ball valve 6 comprises a first normal opening 8, a first opening 9 and a second opening 10, the second three-way ball valve 7 comprises a second normal opening 11, a third opening 12 and a fourth opening 13, a raw water inlet pipeline 14 is connected between the second opening 10 and the fourth opening 13, a concentrated water outlet pipeline 15 is connected between the first opening 9 and the third opening 12, the membrane system inlet pipeline 5 is connected to the raw water inlet pipeline 14 between the second opening 10 and the fourth opening 13, a concentrated water return pipeline 16 is further included, one end of the concentrated water return pipeline 16 is connected to the raw water inlet pipeline 15 between the first opening 9 and the third opening 12, the other end of the membrane system inlet pipeline is connected to the raw water inlet pipeline 14, the raw water inlet pipeline 19 is connected to the membrane system inlet pipeline 18, and the high-pressure pump 20, and the membrane assembly 4 are respectively connected to one side of the high-pressure pump 18, and the membrane assembly 4, and the raw water outlet pipeline 17, and the raw water outlet pipeline 18 are respectively arranged adjacent to the high-concentration membrane assembly 4, and the high-concentration water outlet pipeline 17; membrane module 4 includes that water pipe 1 is produced at the center and twines membrane roll layer 22 on water pipe 1 is produced at the center, membrane roll layer 22 includes the diaphragm, produces water net cloth and dense water cloth, form parallel dense water cloth 3 through setting up a plurality of parallel lattice structures on the dense water cloth, membrane roll layer 22 outside is provided with net purse seine layer 4, the both ends of water pipe 1 are produced at the center set up end cover 5 respectively, the external diameter of end cover 5 is the same with net purse seine layer 4's external diameter.

Preferably, the raw water pump 1 is arranged in a main mode and a standby mode.

Preferably, the concentrate return line 16 is provided with a concentrate discharge valve and a concentrate pressure gauge.

Preferably, a water inlet pressure gauge is arranged on the raw water inlet pipeline 17.

According to the scheme, referring to the attached drawing 2, two ends of a membrane element are respectively defined as an A end and a B end, a first normal opening 8 and a second normal opening 11 of a first three-way ball valve 6 and a second three-way ball valve 7 are in a normally open state, sewage is sent to the B end from the A end if needed, a second opening 10 and a third opening 12 are opened, a first opening 9 and a fourth opening 13 are closed, so that the sewage enters a water inlet pipeline from a raw water pump 1 and a circulating pump 2 of a membrane system inlet pipeline 5, flows into a membrane module 4 from the first normal opening 8, concentrated water flows back to a concentrated water return pipeline 16 from the third opening 12 through a concentrated water pipeline 19, and the sewage is sent to the B end from the A end. If the sewage needs to be sent from the end B to the end A, the first opening 9 and the fourth opening 13 are opened, and the second opening 10 and the third opening 12 are closed, so that the sewage enters the water inlet pipeline from the raw water pump 1 and the circulating pump 2 of the membrane system inlet pipeline 5, flows into the end B of the membrane module 4 from the fourth opening 13 and the concentrated water pipeline 19, and flows to the circulating pump 2 through the sewage membrane system inlet pipeline 5, the first opening 9 and the concentrated water return pipeline 16 of the membrane module 4, and the sewage is sent from the end B to the end A.

After the scheme is realized according to the working principle of the membrane system in the system design, when the device is used, the water flow direction of the membrane system can be changed according to real-time device parameters, pollutants in the membrane elements are timely taken out of the system at variable time, the risk of pollution and blockage of the system is greatly reduced, the cleaning frequency of the membrane system is reduced, the service cycle is prolonged, and the use cost is greatly reduced. The advantages include reduced system design limitation, improved membrane system utilization rate, energy saving, emission reduction, high efficiency, and reduced cost.

The membrane element has the advantages of simple production process, good product system matching and capability of reducing pollution and blockage risks in a bidirectional feeding mode. The arrow direction in the figure is the water flow direction. The traditional roll-type membrane structure consists of a central water production pipe 21, a filter membrane material, external glass fiber reinforced plastics and two end covers 25, and the production process is complex. In order to solve the problem of complex production and manufacturing processes of the traditional membrane, the scheme simplifies the manufacturing process, and completely cancels the external glass fiber reinforced plastic layer of the membrane element by changing the product structure, thereby simplifying the manufacturing process flow, shortening the production period and greatly improving the production efficiency.

Starting from the theory of operation of membrane element in addition, the dense water cloth of traditional roll-type membrane is the rhombus and arranges, and this structure is designed to the water purification quality of water, and the rhombus net forms the dirty stifled dense water passageway of fish scale dirt because of structural problem very easily in the net and reduces water flux when quality of water is high pollution quality of water, increases the energy consumption, reduces the water yield, and cleaning cycle and frequency are very high simultaneously, greatly reduced the life of membrane. The scheme changes the rhombic concentrated water cloth into the parallel grids, so that the flow rate of water can not be reduced due to the grid structure when the water flow passes through the parallel concentrated water cloth 23 which is arranged in the parallel grids, the chemical cleaning period of pollutants on the local accumulated pollutant blocking film surface can not be reduced, the service life of the product is greatly prolonged, and the use cost of customers is reduced.

From the operating mode, the end covers 25 at two ends of the traditional membrane element are provided with sealing ring grooves, when the membrane element is installed, a Y-shaped sealing ring is installed at one water inlet end to prevent water flow from flowing away through the gap between the membrane element and the membrane shell 26, and a certain gap is formed between the external glass fiber reinforced plastic layer of the membrane element and the membrane shell 26. This scheme changes the product external structure into 24 parcels of net wrapping layer, and the external diameter of membrane element is the same with end cover 25 external diameter behind the installation, is interference fit between membrane element and the membrane shell 26, so water flow is along with the net wrapping layer 24 structure blocks gradually pressure of falling along with net wrapping layer 24 when 24 to water flow of the external net wrapping layer of membrane element to realize that water flow flows through membrane element inside all the time. Rivers can only one-way pass when passing through traditional film element in the system, and along with the increase of length of time of using, the restriction of dense water cloth structure, the pollutant is hardly taken away by rivers, can slowly pile up dense water passageway and cause dirty stifled. This scheme cooperation valve group will only originally change the mode of one-way cross flow into the mode that can two-way cross flow, and in use can make the adjustment according to the water flow direction that will pass through the membrane element when the quality of water condition is indefinite, can be timely take away the pollutant in the membrane element system and can avoid the dirty stifled use cost that increases of membrane element completely, let the more stable operation of system simultaneously, promote efficiency greatly.

The structure of the traditional membrane determines that the assembly mode of the membrane in the system is complex, the difficulty in maintaining and replacing the membrane elements is high, the concentricity of the membrane elements in the formwork is greatly different due to the difference of skill proficiency of operators, and the membrane elements are easy to damage. This scheme is because of having cancelled end cover 25 department Y type sealing washer, so change the maintenance when easier operation, excessively cooperates between film element and the membrane shell 26, avoids the film element subassembly to cause the damage inadequately because of the concentricity.

The water flow direction of the traditional roll-type membrane can only flow through towards one direction, the two-way feeding of the membrane element can be realized by the parallel thick water cloth, the pollutant can be more easily taken out of the system by the regular feeding changing mode, the pollution blockage risk of the membrane element is reduced, the chemical cleaning period of the membrane element is greatly reduced, the service life of the membrane element is prolonged, and the use cost is reduced.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the fan belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that modifications and embellishments within the scope of the present disclosure may be made by those skilled in the art without departing from the principles of the present disclosure.

Claims

1. A membrane system apparatus capable of bi-directional cross-flow operation, characterized by: the raw water pump and the circulating pump are arranged on a membrane system membrane inlet pipeline, the valve assembly comprises a first three-way ball valve and a second three-way ball valve which are arranged in parallel, the first three-way ball valve comprises a first normal opening, a first opening and a second opening, the second three-way ball valve comprises a second normal opening, a third opening and a fourth opening, a raw water inlet pipeline is connected between the second opening and the fourth opening, a concentrated water outlet pipeline is connected between the first opening and the third opening, the membrane system membrane inlet pipeline is connected to the raw water inlet pipeline between the second opening and the fourth opening, the raw water inlet pipeline and a concentrated water outlet pipeline are arranged at two ends of the membrane assembly respectively, the raw water inlet pipeline is connected to the first normal opening, one side of the membrane assembly, close to the concentrated water outlet pipeline, is provided with a raw water inlet pipeline, the other side of the membrane assembly is connected to the concentrated water outlet pipeline, and the other side of the membrane assembly is connected to the concentrated water inlet pipeline; the membrane module includes a plurality of filter membrane unit, the filter membrane unit includes membrane unit and membrane shell, the membrane unit includes that the center produces the water pipe and twines the membrane roll layer on the water pipe is produced in the center, the membrane roll layer includes the diaphragm, produces water net cloth and dense water cloth, form parallel dense water cloth through setting up a plurality of parallel lattice structures on the dense water cloth, the outside net purse seine that is provided with of membrane roll layer, the both ends of water pipe are produced in the center set up the end cover respectively, the external diameter of end cover is the same with the external diameter of net purse seine.

2. A membrane system apparatus which is capable of two-way cross-flow operation according to claim 1 wherein: the raw water pump is arranged in a main mode and a standby mode.

3. A membrane system apparatus operable in a two-way cross-flow manner according to claim 1 wherein: and a concentrated water discharge valve and a concentrated water pressure gauge are arranged on the concentrated water return pipeline.

4. A membrane system apparatus operable in a two-way cross-flow manner according to claim 1 wherein: and a water inlet pressure gauge is arranged on the raw water inlet pipeline.