Continuous desalting cross flow device and use method thereof

Abstract

The invention relates to the technical field of membrane separation, in particular to a continuous desalting cross-flow device and a using method thereof, the continuous desalting cross-flow device comprises a workbench, a nitrogen cylinder, a feeding barrel, a pressure gauge and a membrane pool, nitrogen is used as driving force, a solution is added into the feeding barrel, a cover of the feeding barrel is closed, a filtering membrane is placed in the membrane pool, and under the pressure effect, the continuous desalting cross-flow device is obtained. The solution is gradually conveyed to the membrane pool through the conveying pipe to be filtered, one part of the solution is filtered through a filtering membrane in the membrane pool under the action of pressure, and the other part of the solution finally returns to the feeding barrel through the return pipe; the refluxed solution and the original solution are fully and uniformly mixed under the action of the stirrer and are continuously filtered, and the formation of a filter cake on the surface of a film is prevented by virtue of shearing force in the filtering process, so that the concentration and separation of the solution are realized, the concentration of the solution is reduced, and better effluent quality is obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of membrane separation, and particularly relates to a cross-flow device for continuous desalination and its usage method. Background Art

[0002] In many industrial wastewaters and dyes, it is necessary to concentrate and separate the solution to be treated, reduce the solution concentration, obtain better effluent water quality, and meet the discharge standards.

[0003] However, due to the increasing filtration requirements of existing industrial wastewaters and dyes, conventional cross-flow devices can no longer meet the requirements, and membrane separation technology needs to be further improved. Summary of the Invention

[0004] The purpose of the present invention is to provide a cross-flow device for continuous desalination and its usage method, so as to solve the problem that due to the increasing filtration requirements of existing industrial wastewaters and dyes, conventional cross-flow devices can no longer meet the requirements, and membrane separation technology needs to be further improved.

[0005] To achieve the above purpose, the present invention provides a cross-flow device for continuous desalination. The cross-flow device for continuous desalination includes a workbench, a nitrogen cylinder, a feed barrel, a pressure gauge, and a membrane cell. The feed barrel and the membrane cell are installed on the upper surface of the workbench. The nitrogen cylinder is installed on one side of the workbench. The top of the feed barrel is provided with a top cover. The output end of the nitrogen cylinder is connected to the air inlet on the top cover through an air delivery pipe. The bottom of the feed barrel is provided with a discharge port. The discharge port is connected to the membrane cell through a delivery pipe. One end of the membrane cell away from the delivery pipe is connected to the top cover through a return pipe. The pressure gauge is arranged on the delivery pipe. A first valve is arranged on the delivery pipe between the pressure gauge and the membrane cell. A flow meter is arranged on the return pipe. A second valve is arranged on the return pipe between the flow meter and the top cover. A stirrer is arranged inside the feed barrel.

[0006] Wherein, a partition is arranged inside the feed barrel, and the partition divides the interior of the feed barrel into two parts, left and right.

[0007] Wherein, the membrane cell includes an upper shell and a lower shell. The upper shell is detachably connected to the lower shell and is located above the lower shell. A pressure-bearing platform is arranged on the upper surface of the lower shell. A groove is arranged on the pressure-bearing platform. A water outlet penetrating the lower shell is arranged on the bottom wall of the groove.

[0008] Wherein, a plurality of bolt holes are arranged at the edges of both the upper shell and the lower shell, and fixing bolts are installed between two corresponding bolt holes.

[0009] The present invention also provides a method for using a cross-flow device for continuous desalination, which is applied to the cross-flow device for continuous desalination as described above, and includes the following steps:

[0010] Add a filtering solution into the feed bucket, close the top cover of the feed bucket, place the filter membrane in the membrane tank, and prepare for filtration;

[0011] Open the nitrogen cylinder, and nitrogen enters the feed bucket through the gas delivery pipe. At the same time, start the stirrer. Nitrogen causes the solution to enter the delivery pipe, flow through the pressure gauge and the first valve, and enter the membrane tank. During pressure filtration, the solution penetrates the filter membrane, and observe the reading on the pressure gauge;

[0012] After part of the solution is filtered by the filter membrane, it flows back into the feed bucket through the reflux pipe. The filtration process is repeated to achieve the concentration and separation of the solution, reduce the solution concentration, obtain better effluent water quality, and meet the discharge standard.

[0013] A cross-flow device for continuous desalination and its using method of the present invention include a workbench, a nitrogen cylinder, a feed bucket, a pressure gauge, and a membrane tank. Using nitrogen as the driving force, add a solution into the feed bucket, close the lid of the feed bucket, place the filter membrane inside the membrane tank. Under the action of pressure, the solution is gradually transported to the membrane tank through the delivery pipe for filtration. Part of the solution will be filtered through the filter membrane in the membrane tank under the action of pressure, and the other part of the solution finally returns to the feed bucket through the reflux pipe. And by installing the stirrer in the feed bucket, the refluxed solution and the original solution are fully mixed under the action of the stirrer to make the mixture uniform, and continue to be filtered. And during the filtration process, the formation of the filter cake on the surface of the thin film is prevented by means of shear force, so as to achieve the concentration and separation of the solution, reduce the solution concentration, and obtain better effluent water quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 is a schematic structural diagram of the cross-flow device for continuous desalination provided by the present invention.

[0016] Figure 2 is a perspective view of the internal structure of the feed bucket provided by the present invention.

[0017] Figure 3It is a schematic diagram of the external structure of the membrane cell provided by the present invention.

[0018] Figure 4 It is a schematic diagram of the internal structure of the lower housing provided by the present invention.

[0019] Figure 5 It is a step flow chart of the usage method of the cross-flow device for continuous desalination provided by the present invention.

[0020] 101 - Workbench, 102 - Nitrogen cylinder, 103 - Feed barrel, 104 - Pressure gauge, 105 - Membrane cell, 106 - Top cover, 107 - Gas transmission pipe, 108 - Air inlet, 109 - Discharge port, 110 - Delivery pipe, 111 - Return pipe, 112 - First valve, 113 - Flowmeter, 114 - Second valve, 115 - Stirrer, 116 - Partition board, 117 - Upper housing, 118 - Lower housing, 119 - Pressure-bearing platform, 120 - Groove, 121 - Water outlet, 122 - Bolt hole, 123 - Fixing bolt. Detailed implementation manners

[0021] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation of the present invention.

[0022] Please refer to Figures 1 to 4 , the present invention provides a cross-flow device for continuous desalination. The cross-flow device for continuous desalination includes a workbench 101, a nitrogen cylinder 102, a feed barrel 103, a pressure gauge 104, and a membrane cell 105. The upper surface of the workbench 101 is provided with the feed barrel 103 and the membrane cell 105. The nitrogen cylinder 102 is installed on one side of the workbench 101. The top of the feed barrel 103 is provided with a top cover 106. The output end of the nitrogen cylinder 102 is connected to the air inlet 108 on the top cover 106 through a gas transmission pipe 107. The bottom of the feed barrel 103 is provided with a discharge port 109. The discharge port 109 is connected to the membrane cell 105 through a delivery pipe 110. One end of the membrane cell 105 away from the delivery pipe 110 is connected to the top cover 106 through a return pipe 111. The delivery pipe 110 is provided with the pressure gauge 104. A first valve 112 is provided on the delivery pipe 110 between the pressure gauge 104 and the membrane cell 105. The return pipe 111 is provided with a flowmeter 113. A second valve 114 is provided on the return pipe 111 between the flowmeter 113 and the top cover 106. A stirrer 115 is provided inside the feed barrel 103.

[0023] In this embodiment, nitrogen is used as the driving force. A solution is added to the feed bucket 103, and the lid of the feed bucket 103 is closed. A filter membrane is placed inside the membrane cell 105. Under the action of pressure, the solution is gradually transported to the membrane cell 105 through the delivery pipe 110 for filtration. Among them, a part of the solution will be filtered through the filter membrane in the membrane cell 105 under the action of pressure, and another part of the solution finally returns to the feed bucket 103 through the reflux pipe 111. And by installing the stirrer 115 in the feed bucket 103, the refluxed solution and the original solution are fully mixed under the action of the stirrer 115 to make the mixture uniform, and continue to be filtered. During the filtration process, the formation of filter cake on the surface of the thin film is prevented by shear force, so as to realize the concentration and separation of the solution, reduce the solution concentration, and obtain better effluent water quality.

[0024] Further, a partition 116 is provided inside the feed bucket 103, and the partition 116 divides the interior of the feed bucket 103 into two parts, left and right.

[0025] In this embodiment, nitrogen enters the left side of the partition 116 through the air inlet 108. Under the action of pressure, the solution gradually comes out from the outlet 109 on the right and is filtered through the membrane cell 105.

[0026] Further, the membrane cell 105 includes an upper housing 117 and a lower housing 118. The upper housing 117 is detachably connected to the lower housing 118 and is located above the lower housing 118. A pressure-bearing platform 119 is provided on the upper surface of the lower housing 118. A groove 120 is provided on the pressure-bearing platform 119, and a water outlet 121 penetrating the lower housing 118 is provided on the bottom wall of the groove 120.

[0027] In this embodiment, through the setting of the pressure-bearing platform 119, the installation of the filter membrane can be completed. Through the setting of the water outlet 121, the filtered solution can be discharged from the membrane cell 105.

[0028] Further, a plurality of bolt holes 122 are provided at the edges of the upper housing 117 and the lower housing 118, and fixing bolts 123 are installed between two corresponding bolt holes 122.

[0029] In this embodiment, through the setting of the bolt holes 122 and the fixing bolts 123, the fixed installation of the upper housing 117 and the lower housing 118 can be completed.

[0030] Please refer to Figure 5 , the present invention also provides a method for using a cross-flow device for continuous desalination, which is applied to the cross-flow device for continuous desalination as described above, and includes the following steps:

[0031] S1: Add the filtering solution into the feed barrel 103, close the top cover 106 of the feed barrel 103, place the filter membrane in the membrane cell 105, and get ready for filtration.

[0032] S2: Open the nitrogen cylinder 102. Nitrogen enters the feed barrel 103 through the gas transmission pipe 107. Meanwhile, start the stirrer 115. Nitrogen forces the solution to enter the delivery pipe 110, flow through the pressure gauge 104 and the first valve 112, and then enter the membrane cell 105. When pressure filtration is carried out, the solution permeates through the filter membrane. Observe the reading on the pressure gauge 104.

[0033] S3: After part of the solution is filtered by the filter membrane, it flows back into the feed barrel 103 through the reflux pipe 111. The filtration process is repeated to achieve the concentration and separation of the solution, reduce the solution concentration, obtain better effluent water quality, and meet the discharge standard.

[0034] In this embodiment, nitrogen is used as the driving force. Add the solution into the feed barrel 103, close the lid of the feed barrel 103, place the filter membrane inside the membrane cell 105. Under the action of pressure, the solution is gradually transported to the membrane cell 105 through the delivery pipe 110 for filtration. Among them, part of the solution will be filtered through the filter membrane in the membrane cell 105 under the action of pressure, and the other part of the solution finally returns to the feed barrel 103 through the reflux pipe 111. And by installing the stirrer 115 in the feed barrel 103, the refluxed solution and the original solution are fully mixed under the action of the stirrer 115 to make the mixture uniform, and continue the filtration. During the filtration process, the formation of the filter cake on the surface of the membrane is prevented by means of shear force, so as to achieve the concentration and separation of the solution, reduce the solution concentration, and obtain better effluent water quality.

[0035] What is disclosed above is only a preferred embodiment of the present invention. Of course, the scope of the rights of the present invention cannot be limited by this. Those of ordinary skill in the art can understand all or part of the processes of the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the invention.

Claims

1. A cross-flow device for continuous desalination, characterized in that it includes a workbench, a nitrogen cylinder, a feed barrel, a pressure gauge and a membrane cell. The upper surface of the workbench is equipped with the feed barrel and the membrane cell. The nitrogen cylinder is installed on one side of the workbench. The top of the feed barrel is provided with a top cover. The output end of the nitrogen cylinder is connected to the air inlet on the top cover through an air delivery pipe. The bottom of the feed barrel is provided with a discharge port. The discharge port is connected to the membrane cell through a delivery pipe. One end of the membrane cell away from the delivery pipe is connected to the top cover through a reflux pipe. The delivery pipe is provided with the pressure gauge. A first valve is provided on the delivery pipe between the pressure gauge and the membrane cell. The reflux pipe is provided with a flow meter. A second valve is provided on the reflux pipe between the flow meter and the top cover. A stirrer is arranged inside the feed barrel.

2. The cross-flow device for continuous desalination according to claim 1, characterized in that a partition is arranged inside the feed barrel. The partition divides the interior of the feed barrel into two parts, left and right. The air inlet and the discharge port are respectively located on both sides of the partition.

3. The cross-flow device for continuous desalination according to claim 2, characterized in that the membrane cell includes an upper shell and a lower shell. The upper shell is detachably connected to the lower shell and is located above the lower shell. The upper surface of the lower shell is provided with a pressure-bearing platform. A groove is arranged on the pressure-bearing platform. The bottom wall of the groove is provided with a water outlet penetrating through the lower shell.

4. The cross-flow device for continuous desalination according to claim 3, characterized in that a plurality of bolt holes are arranged at the edges of the upper shell and the lower shell. Fixed bolts are installed between two corresponding bolt holes.

5. A method for using a cross-flow device for continuous desalination, which is applied to the cross-flow device for continuous desalination as described in claim 1, characterized in that, It includes the following steps: Add a filtered solution to the feed barrel, close the top cover of the feed barrel, place a filter membrane in the membrane cell, and prepare for filtration; Open the nitrogen cylinder. Nitrogen enters the feed barrel through the air delivery pipe. At the same time, start the stirrer. Nitrogen promotes the solution to enter the delivery pipe, flow through the pressure gauge and the first valve, and enter the membrane cell. During pressure filtration, the solution penetrates the filter membrane. Observe the reading on the pressure gauge; After part of the solution is filtered by the filter membrane, it flows back into the feed barrel through the reflux pipe. The filtration process is repeated to achieve the concentration and separation of the solution, reduce the solution concentration, obtain better effluent water quality, and meet the discharge standard.

Images