System for treating high-turbidity water through internal pressure ultrafiltration membrane

Abstract

The utility model discloses a system for treating high-turbidity water by using an internal pressure ultrafiltration membrane, relates to the technical field of filtering equipment, aims to solve the technical problem that the high-turbidity water is difficult to treat by using the current internal pressure ultrafiltration membrane, and comprises an ultrafiltration membrane part. According to the utility model, the air inlet valve is additionally arranged, after filtration is carried out for a period of time, pollutants in a membrane tube of the ultrafiltration membrane part can be discharged through air washing, and then filtration is continued, so that the defect of poor assimilative capacity of an internal pressure membrane can be avoided, and meanwhile, water produced by ultrafiltration is not used during air washing, so that the recovery rate of ultrafiltration is prevented from being reduced; meanwhile, by utilizing the characteristic of thorough backwashing of the internal pressure membrane, higher flux and filtering time can be obtained compared with that of the external pressure membrane, and the recovery rate of water produced by ultrafiltration is improved; according to the utility model, the process of the internal pressure ultrafiltration membrane is optimized, so that when the internal pressure ultrafiltration membrane is used for treating high-turbidity water, not only is the defect that the pollutant holding space of the internal pressure ultrafiltration membrane is limited relative to that of an external pressure ultrafiltration membrane avoided, but also the advantage of thorough backwashing of the internal pressure ultrafiltration membrane is exerted.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering equipment, and more specifically to a system for treating high-turbidity water using an internal pressure ultrafiltration membrane. Background Art

[0002] In terms of filtration principles, internal-pressure ultrafiltration membranes retain pollutants within the membrane tubes, while external-pressure ultrafiltration membranes retain pollutants in the space outside the membrane tubes. Ultrafiltration membranes have thinner tubes and limited space. This results in a limited capacity for internal-pressure membranes compared to external-pressure membranes. However, during backwashing, the opposite is true. During backwashing, pollutants flow directly out of the membrane tubes, eliminating dead corners. However, with external-pressure membranes, uneven water flow can create dead corners and result in incomplete backwashing. Therefore, internal-pressure membranes offer a cleaner backwash than external-pressure membranes.

[0003] Compared with external pressure ultrafiltration membrane, internal pressure ultrafiltration membrane has the advantage of thorough backwashing. External pressure ultrafiltration membrane has the advantage of stronger dirt holding capacity compared with internal pressure ultrafiltration membrane.

[0004] However, in existing treatment systems, when the raw water is highly turbid, external pressure ultrafiltration membranes with strong dirt holding capacity are generally used to ensure longer filtration time. Internal pressure ultrafiltration membranes are difficult to process. In view of this, we propose a system for treating high turbidity water using internal pressure ultrafiltration membranes. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the existing technology, meet the actual needs, and provide an internal pressure ultrafiltration membrane treatment system for high turbidity water to solve the technical problem that the current internal pressure ultrafiltration membrane is difficult to treat high turbidity water.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: an internal pressure ultrafiltration membrane system for treating high turbidity water, comprising an ultrafiltration membrane portion, the water inlet end of the ultrafiltration membrane portion is connected to a water inlet valve and an air inlet valve through a pipeline, the water inlet valve is connected to a raw water pump through a pipeline, the air inlet valve is connected to an air inlet pump through a pipeline, the water inlet valve and the ultrafiltration membrane portion are connected to a lower drain valve and an upper drain valve through a pipeline, the upper drain valve and the lower drain valve are both connected to a sewage discharge portion through a pipeline, the side of the ultrafiltration membrane portion is connected to a water production valve and a backwash valve through a pipeline, the backwash valve is connected to an ultrafiltration backwash pump through a pipeline, and the water production valve is connected to a water outlet through a pipeline.

[0007] Preferably, the top end of the ultrafiltration module is connected to an upper discharge valve, and the bottom end of the ultrafiltration membrane is connected to a lower discharge valve.

[0008] Preferably, a flow meter is installed on the water outlet.

[0009] Preferably, a first pressure gauge is installed on the pipeline connecting the ultrafiltration membrane portion with the water inlet valve and the air inlet valve.

[0010] Preferably, a second pressure gauge is installed on the pipeline connecting the ultrafiltration membrane part with the water production valve and the backwash valve.

[0011] Preferably, a third pressure gauge is installed on the pipeline connecting the ultrafiltration membrane part and the upper row valve.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The utility model adds an air inlet valve, which can discharge the pollutants in the membrane tube of the ultrafiltration membrane through air washing after filtering for a period of time, and then continue to filter, so that the disadvantage of the poor pollution holding capacity of the internal pressure membrane can be avoided. At the same time, the air washing does not use the ultrafiltration water, and the ultrafiltration recovery rate is avoided to be reduced; at the same time, the internal pressure membrane is backwashed thoroughly, and a higher flux and filtration time than the external pressure membrane can be obtained, thereby improving the ultrafiltration water recovery rate; the utility model optimizes the process of the internal pressure ultrafiltration membrane, so that the internal pressure ultrafiltration membrane not only avoids the disadvantage of the limited pollution holding space of the internal pressure ultrafiltration membrane compared with the external pressure ultrafiltration membrane when treating high turbidity water, but also gives full play to the advantage of the internal pressure ultrafiltration membrane being backwashed thoroughly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a system schematic diagram of the present utility model.

[0015] Explanation of the numbers in the figure: 1. Ultrafiltration membrane part; 2. Water inlet valve; 3. Air inlet valve; 4. Raw water pump; 5. Air inlet pump; 6. Upper discharge valve; 7. Lower discharge valve; 8. Backwash valve; 9. Water production valve; 10. Ultrafiltration backwash pump; 11. Sewage discharge part; 12. Water outlet part; 13. Flow meter; 14. First pressure gauge; 15. Second pressure gauge; 16. Third pressure gauge. DETAILED DESCRIPTION

[0016] like Figure 1 As shown, the utility model relates to an internal pressure ultrafiltration membrane system for treating high turbidity water, comprising an ultrafiltration membrane portion 1, the water inlet end of the ultrafiltration membrane portion 1 is connected to a water inlet valve 2 and an air inlet valve 3 through a pipeline, the water inlet valve 2 is connected to a raw water pump 4 through a pipeline, the air inlet valve 3 is connected to an air inlet pump 5 through a pipeline, the water inlet valve 2 and the ultrafiltration membrane portion 1 are connected to a lower discharge valve 7 and an upper discharge valve 6 through a pipeline, the upper discharge valve 6 and the lower discharge valve 7 are both connected to a sewage discharge portion 11 through a pipeline, the side of the ultrafiltration membrane portion 1 is connected to a water production valve 9 and a backwash valve 8 through a pipeline, the backwash valve 8 is connected to an ultrafiltration backwash pump 10 through a pipeline, and the water production valve 9 is connected to a water outlet portion 12 through a pipeline;

[0017] The utility model adds an air inlet valve 3, which can discharge the pollutants in the membrane tube of the ultrafiltration membrane part 1 through air washing after filtering for a period of time, and then continue to filter, so that the disadvantage of the poor pollution holding capacity of the internal pressure membrane can be avoided. At the same time, the air washing does not use the ultrafiltration water, and the ultrafiltration recovery rate is avoided to be reduced; at the same time, the internal pressure membrane has the characteristic of thorough backwashing, and a higher flux and filtration time than the external pressure membrane can be obtained, thereby improving the ultrafiltration water recovery rate; the utility model optimizes the process of the internal pressure ultrafiltration membrane, so that the internal pressure ultrafiltration membrane not only avoids the disadvantage of limited pollution holding space of the internal pressure ultrafiltration membrane compared with the external pressure ultrafiltration membrane when treating high turbidity water, but also gives full play to the advantage of thorough backwashing of the internal pressure ultrafiltration membrane.

[0018] As another embodiment of the present invention, the top end of the ultrafiltration module is connected to an upper discharge valve 6, and the bottom end of the ultrafiltration membrane portion 1 is connected to a lower discharge valve 7;

[0019] A flow meter 13 is installed on the water outlet 12 ; the flow rate to the water outlet 12 is detected by the flow meter 13 .

[0020] A first pressure gauge 14 is installed on the pipeline connecting the ultrafiltration membrane part 1 with the water inlet valve 2 and the air inlet valve 3; the pressure at the pipeline connecting the ultrafiltration membrane part 1 with the water inlet valve 2 and the air inlet valve 3 is detected by the first pressure gauge 14.

[0021] A second pressure gauge 15 is installed on the pipeline connecting the ultrafiltration membrane part 1 with the water production valve 9 and the backwash valve 8; the pressure at the pipeline connecting the ultrafiltration membrane part 1 with the water production valve 9 and the backwash valve 8 is detected by the second pressure gauge 15.

[0022] A third pressure gauge 16 is installed on the pipeline connecting the ultrafiltration membrane part 1 and the upper discharge valve 6 ; the pressure at the pipeline connecting the ultrafiltration membrane part 1 and the upper discharge valve 6 is detected by the third pressure gauge 16 .

[0023] Working principle: This embodiment provides a system for treating high turbidity water with an internal pressure ultrafiltration membrane. When in use, the system adopts the following steps: forward wash - filtration - air wash - filtration - air wash - filtration - air wash - upper backwash - lower backwash - forward wash;

[0024] During the wash cycle, the water inlet valve 2, the upper discharge valve 6 and the raw water pump 4 are opened. The water from the raw water pump 4 enters the ultrafiltration membrane section 1 through the water inlet valve 2, passes through the ultrafiltration membrane section 1, and is discharged to the sewage section 11 through the upper discharge valve 6.

[0025] During filtration, the water inlet valve 2, the water production valve 9 and the raw water pump 4 are opened. The water from the raw water pump 4 enters the ultrafiltration membrane section 1 through the water inlet valve 2, passes through the ultrafiltration membrane section 1, and is discharged to the water outlet section 12 through the water production valve 9.

[0026] During air washing, the water inlet valve 2, the upper discharge valve 6, the air inlet valve 3, the raw water pump 4 and the air inlet pump 5 are opened. The water from the raw water pump 4 and the gas from the air inlet pump 5 enter the ultrafiltration membrane section 1 through the water inlet valve 2 and the air inlet valve 3, and after passing through the ultrafiltration membrane section 1, are discharged to the sewage discharge section 11 through the upper discharge valve 6.

[0027] For upper backwash, open the backwash valve 8, upper discharge valve 6, air inlet valve 3, air inlet pump 5 and backwash water pump. The water from the backwash water pump and the gas from the air inlet pump 5 enter the ultrafiltration membrane section 1 through the backwash valve 8 and the air inlet valve 3, and then are discharged to the sewage discharge section 11 through the upper discharge valve 6 after passing through the ultrafiltration membrane section 1.

[0028] During backwashing, the backwash valve 8, the lower discharge valve 7 and the backwash water pump are opened. The water flow from the backwash water pump enters the ultrafiltration membrane part 1 through the backwash valve 8, passes through the ultrafiltration membrane part 1, and is discharged to the sewage discharge part 11 through the lower discharge valve 7.

[0029] The embodiments disclosed in the present invention are preferred embodiments, but are not limited to them. Ordinary technicians in this field can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. As long as they do not deviate from the spirit of the present invention, they are all within the scope of protection of the present invention.

Claims

1. An internal pressure ultrafiltration membrane system for treating high turbidity water, characterized in that: The invention comprises an ultrafiltration membrane part (1), wherein the water inlet end of the ultrafiltration membrane part (1) is connected to a water inlet valve (2) and an air inlet valve (3) through a pipeline, the water inlet valve (2) is connected to a raw water pump (4) through a pipeline, the air inlet valve (3) is connected to an air inlet pump (5) through a pipeline, the water inlet valve (2) and the ultrafiltration membrane part (1) are connected to a lower discharge valve (7) and an upper discharge valve (6) through a pipeline, the upper discharge valve (6) and the lower discharge valve (7) are both connected to a sewage discharge part (11) through a pipeline, the side of the ultrafiltration membrane part (1) is connected to a water production valve (9) and a backwash valve (8) through a pipeline, the backwash valve (8) is connected to an ultrafiltration backwash pump (10) through a pipeline, and the water production valve (9) is connected to a water outlet part (12) through a pipeline.

2. The internal pressure ultrafiltration membrane treatment system for high turbidity water according to claim 1, characterized in that: The top end of the ultrafiltration membrane portion is connected to an upper discharge valve (6), and the bottom end of the ultrafiltration membrane portion (1) is connected to a lower discharge valve (7).

3. The system for treating high turbidity water using an internal pressure ultrafiltration membrane according to claim 2, characterized in that: A flow meter (13) is installed on the water outlet (12).

4. The system for treating high turbidity water using an internal pressure ultrafiltration membrane according to claim 3, characterized in that: A first pressure gauge (14) is installed on the pipeline connecting the ultrafiltration membrane part (1) with the water inlet valve (2) and the air inlet valve (3).

5. The system for treating high turbidity water using an internal pressure ultrafiltration membrane according to claim 4, characterized in that: A second pressure gauge (15) is installed on the pipeline connecting the ultrafiltration membrane part (1) with the water production valve (9) and the backwash valve (8).

6. The system for treating high turbidity water using an internal pressure ultrafiltration membrane according to claim 5, characterized in that: A third pressure gauge (16) is installed on the pipeline connecting the ultrafiltration membrane part (1) and the upper discharge valve (6).

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