Filtering system with chemical cleaning external pressure type hollow fiber ultrafiltration membrane

Abstract

The utility model discloses a filtering system with a chemical cleaning external pressure type hollow fiber ultrafiltration membrane. The filtering system comprises a preliminary filtering device, a membrane treatment device, a chlorine dioxide generator, a finished product water tank, a backwashing pipeline and a water supply branch, the primary filtering device comprises a raw water tank, a raw water tank water outlet booster pump, a quartz sand filter, an activated carbon filter, an ion exchanger and a security filter; the membrane treatment device comprises an ultrafiltration membrane booster pump, a hollow fiber ultrafiltration membrane, a side upper opening parallel connection pipeline, a sewage parallel connection pipeline and a sewage tank; the simple and low-cost filtering device is provided for remote small-scale villages or field operation areas, the domestic water standard is met, and meanwhile, a set of simple automatic hardware cleaning device is provided for the ultrafiltration membrane.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of water treatment, especially domestic water treatment system. BACKGROUND

[0002] Compared with river water, lake water and deep well water have higher hardness and salt content, and chroma and turbidity cannot meet the drinking water health standards. In the past, in remote areas, not only can't enjoy large-scale centralized water supply in cities, but also small-scale centralized water supply in towns is difficult to carry out due to small population scale, and source water is provided to users without treatment or only simple disinfection. The water source of many remote villages is lake water and deep well water, and the water quality is often poor, and the water quality is worrying after simple disinfection. A simple, easy-to-maintain small water treatment device is needed to realize small-scale water supply in remote areas. SUMMARY

[0003] The utility model discloses at least solve one of the technical defects.

[0004] Therefore, the utility model discloses a kind of filtration system with chemical cleaning outer pressure type hollow fiber ultrafiltration membrane, comprising: preliminary filtration device, membrane treatment device, chlorine dioxide generator, finished water tank, backwashing pipeline, water supply branch line;

[0005] The preliminary filtration device includes raw water tank, raw water tank outlet booster pump, quartz sand filter, activated carbon filter, ion exchanger, security filter;

[0006] The membrane treatment device includes ultrafiltration membrane booster pump, hollow fiber ultrafiltration membrane, side upper mouth and connecting pipeline, sewage and connecting pipeline, sewage tank;

[0007] Pressure sensor is provided at the outlet pipeline of the ultrafiltration membrane booster pump;

[0008] The raw water tank, the raw water tank outlet booster pump, the quartz sand filter, the activated carbon filter, the ion exchanger, the security filter and the ultrafiltration membrane booster pump are sequentially connected by pipeline;

[0009] The side lower mouth of two or more hollow fiber ultrafiltration membranes is connected to the outlet pipeline of the ultrafiltration membrane booster pump;

[0010] Electromagnetic valve is provided at the side lower mouth pipeline of the hollow fiber ultrafiltration membrane;

[0011] The side upper mouth of two or more hollow fiber ultrafiltration membranes is connected to one end of the side upper mouth and connecting pipeline;

[0012] The side upper mouth and connecting pipeline dry pipe is provided with the electromagnetic valve;

[0013] Two or more side lower openings of the hollow fiber ultrafiltration membrane are connected to the upper opening and the sewage connection pipe, and the electromagnetic valve is arranged at the communication pipe between the side lower opening of the hollow fiber ultrafiltration membrane and the sewage connection pipe;

[0014] The sewage pipes of the quartz sand filter, the activated carbon filter, the ion exchanger, and the sewage connection pipe are connected to the water inlet end of the sewage tank.

[0015] The sewage tank stores water for reuse as reclaimed water.

[0016] The top of the product water tank is provided with a product water tank pipeline.

[0017] The liquid outlet pipeline of the chlorine dioxide generator is provided with a metering pump.

[0018] The liquid outlet pipeline of the chlorine dioxide generator is connected to the middle rear section of the side upper connection pipeline.

[0019] The water inlet end of the product water tank pipeline and the water outlet end of the backwashing pipeline are connected to the end of the side upper connection pipeline.

[0020] The product water tank pipeline is sequentially provided with the electromagnetic valve, the flow meter, and the water mixing valve from the near end to the far end along the connection end of the side upper connection pipeline.

[0021] The backwashing pipeline is sequentially provided with the backwashing booster pump, the pressure sensor, the flow meter, and the electromagnetic valve from the near end to the far end along the water outlet end.

[0022] The pipeline of the water supply branch is sequentially provided with the frequency conversion water supply pump group, the ultraviolet filter, the pressure sensor, and the flow meter along the water flow direction.

[0023] The backwashing booster pump and the frequency conversion water supply pump group are connected to the water outlet end of the product water tank.

[0024] During the filtration process, the electromagnetic valves of the side lower opening of the hollow fiber ultrafiltration membrane, the side upper connection pipeline, and the product water tank pipeline are opened, and other electromagnetic valves in the system are closed; the source water enters the raw water tank, and then passes through the quartz sand filter, the activated carbon filter, the ion exchanger, the security filter, and the hollow fiber ultrafiltration membrane to complete the filtration in the water tank; the sewage in the hollow fiber ultrafiltration membrane flows into the sewage tank through the upper opening of the hollow fiber membrane and the sewage connection pipeline; during the process, the flow meter on the product water tank pipeline detects the filtration water flow, and the chlorine dioxide generator adds chlorine dioxide according to the filtration water flow detected by the flow meter and the product water concentration requirement to meet the product water quality requirement.

[0025] During the forward washing process of the hollow fiber ultrafiltration membrane, the electromagnetic valve of the lower outlet of the hollow fiber ultrafiltration membrane and the pipeline connected with the ultrafiltration membrane booster pump is opened, and other electromagnetic valves in the system are closed; the water pressure of the pressure sensor at the water outlet end of the ultrafiltration membrane booster pump meets the forward washing requirement of the ultrafiltration membrane, and the forward washing water of the hollow fiber ultrafiltration membrane enters from the lower outlet of the ultrafiltration membrane, sequentially flows into the sewage tank through the upper opening of the hollow fiber membrane and the sewage pipeline.

[0026] During the backwashing process of the hollow fiber ultrafiltration membrane, the electromagnetic valves of the backwashing pipeline, the upper outlet connecting pipeline and the lower outlet connecting pipeline of the hollow fiber ultrafiltration membrane are opened, and other electromagnetic valves in the system are closed; the pressure sensor at the water outlet end of the backwashing booster pump monitors the water pressure of the backwashing booster pump to supply water according to the backwashing water pressure required by the hollow fiber ultrafiltration membrane, and the backwashing water enters the upper outlet of the hollow fiber ultrafiltration membrane, and is discharged from the upper outlet and the lower outlet into the sewage tank at the same time.

[0027] When the hollow fiber ultrafiltration membrane is used for a long time and has more attached pollutants, chemical backwashing is required. At this time, the electromagnetic valves of the backwashing pipeline, the upper outlet connecting pipeline and the lower outlet connecting pipeline of the hollow fiber ultrafiltration membrane are opened, and other electromagnetic valves in the system are closed; the pressure sensor at the water outlet end of the backwashing booster pump monitors the water pressure of the backwashing booster pump to supply water according to the backwashing water pressure required by the hollow fiber ultrafiltration membrane, and the flow meter at the water outlet end of the backwashing booster pump monitors the flow, the chlorine dioxide generator adds chlorine dioxide according to the flow detected by the flow meter and the backwashing water concentration requirement, and the backwashing water enters the upper outlet of the hollow fiber ultrafiltration membrane, and is discharged from the upper outlet and the lower outlet into the sewage tank at the same time.

[0028] The utility model has the advantages and positive effects that: in the case that remote small-scale villages cannot carry out centralized water supply according to towns, and source water such as lake water and deep well water cannot meet the drinking water standard due to hardness and salt content, a simple, low-cost and easy-to-maintain filtration and disinfection equipment is provided, which effectively reduces the total dissolved solids, hardness and turbidity; considering that the hollow fiber ultrafiltration membrane has a high removal rate for suspended solids, colloids, macromolecules, bacteria and other substances in water, and the surface of the membrane needs to be cleaned regularly, the ultrafiltration membrane cleaning device fully utilizes the original filtration system device such as the chlorine dioxide generator, and only a small amount of device is added, so that the hardware meets the automatic cleaning function requirement of the ultrafiltration membrane. BRIEF DESCRIPTION OF DRAWINGS

[0029] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0030] Figure 1 It is a schematic diagram of the filtration system with the chemical cleaning hollow fiber ultrafiltration membrane of the utility model.

[0031] The figure shows the following: preliminary filtration device 1, raw water tank 11, raw water tank outlet booster pump 12, quartz sand filter 13, activated carbon filter 14, ion exchanger 15, security filter 16, membrane treatment device 2, ultrafiltration membrane booster pump 21, hollow fiber ultrafiltration membrane 22, side upper port parallel connection pipe 23, sewage parallel connection pipe 24, sewage tank 25, chlorine dioxide generator 3, metering pump 31, finished water tank 4, finished water tank pipe 41, backwash pipe 5, backwash booster pump 51, water supply branch 6, variable frequency water supply pump group 61, ultraviolet filter 62, solenoid valve a, pressure sensor b, flow meter c. DETAILED DESCRIPTION

[0032] The present invention will be described in more detail below with reference to the accompanying drawings, which illustrate preferred embodiments of the present invention. It should be understood that those skilled in the art may modify the present invention described herein while still achieving the advantageous effects of the present invention. Therefore, the following description should be understood as a general guide for those skilled in the art and not as a limitation of the present invention.

[0033] like Figure 1 As shown, a filtration system with a chemical cleaning external pressure type hollow fiber ultrafiltration membrane is characterized by comprising: a preliminary filtration device 1, a membrane treatment device 2, a chlorine dioxide generator 3, a finished water tank 4, a backwash pipe 5, and a water supply branch 6;

[0034] The primary filtration device 1 includes a raw water tank 11, a raw water tank outlet booster pump 12, a quartz sand filter 13, an activated carbon filter 14, an ion exchanger 15, and a security filter 16;

[0035] Membrane treatment device 2, including ultrafiltration membrane booster pump 21, hollow fiber ultrafiltration membrane 22, side upper port connecting pipe 23, sewage connecting pipe 24, sewage tank 25;

[0036] A pressure sensor b is provided at the outlet pipe of the ultrafiltration membrane booster pump 21;

[0037] The raw water tank 11, the raw water tank outlet booster pump 12, the quartz sand filter 13, the activated carbon filter 14, the ion exchanger 15, the security filter 16, and the ultrafiltration membrane booster pump 21 are connected in sequence by pipelines;

[0038] The side lower ports of two or more hollow fiber ultrafiltration membranes 22 are connected to the outlet pipe of the ultrafiltration membrane booster pump 21;

[0039] A solenoid valve a is provided at the side lower pipe of the hollow fiber ultrafiltration membrane 22;

[0040] The side upper end of the two or more hollow fiber ultrafiltration membranes 22 is connected to one end of the side upper end connecting pipe 23;

[0041] An electromagnetic valve a is arranged at the main pipe of the side upper end connecting pipe 23;

[0042] The side lower end of the two or more hollow fiber ultrafiltration membranes 22 is connected to the sewage connecting pipe 24, and an electromagnetic valve a is arranged at the connecting pipe between the side lower end of the hollow fiber ultrafiltration membrane and the sewage connecting pipe 24;

[0043] The sewage pipes of the quartz sand filter 13, the activated carbon filter 14, the ion exchanger 15 and the sewage connecting pipe 24 are connected to the water inlet end of the sewage tank 25;

[0044] The water inlet end of the finished water tank 4 is provided with a finished water tank pipe 41;

[0045] A metering pump 31 is arranged at the liquid outlet pipe of the chlorine dioxide generator 3;

[0046] The liquid outlet pipe of the chlorine dioxide generator 3 is connected to the middle rear section of the side upper end connecting pipe 23;

[0047] The water inlet end of the finished water tank pipe 41 and the water outlet end of the backwashing pipe 5 are connected to the end of the side upper end connecting pipe 23;

[0048] The finished water tank pipe 41 is sequentially provided with an electromagnetic valve a, a flow meter c and a mixed water valve 42 from the connection end of the side upper end connecting pipe 23 to the far end;

[0049] The backwashing pipe 5 is sequentially provided with a backwashing booster pump 51, a pressure sensor b, a flow meter c and an electromagnetic valve a from the water outlet end to the far end;

[0050] The pipe of the water supply branch 6 is sequentially provided with a variable frequency water supply pump group 61, an ultraviolet filter 62, a pressure sensor b and a flow meter c along the water flow direction;

[0051] The backwashing booster pump 51 and the variable frequency water supply pump group 61 are connected to the water outlet end of the finished water tank 4.

[0052] The above has been described in detail through the embodiments, but the content is only the preferred embodiments of the utility model, and cannot be considered as limiting the implementation range of the utility model. Any equivalent change and improvement within the application range of the utility model should still belong to the patent coverage range of the utility model.

Claims

1. A filtration system with chemically cleaned outside pressure type hollow fiber ultrafiltration membranes, characterized by, The utility model relates to a kind of water purification systems, including: Preliminary filtering device (1), membrane treatment device (2), chlorine dioxide generator (3), finished water tank (4), backwashing pipeline (5), water supply branch (6); The preliminary filtering device (1) includes raw water tank (11), raw water tank outlet booster pump (12), quartz sand filter (13), activated carbon filter (14), ion exchanger (15), security filter (16); The membrane treatment device (2) includes ultrafiltration membrane booster pump (21), hollow fiber ultrafiltration membrane (22), side upper mouth and connecting pipeline (23), sewage and connecting pipeline (24), sewage tank (25); The ultrafiltration membrane booster pump (21) outlet pipeline is equipped with pressure sensor (b); The raw water tank (11), the raw water tank outlet booster pump (12), the quartz sand filter (13), the activated carbon filter (14), the ion exchanger (15), the security filter (16), the ultrafiltration membrane booster pump (21) are sequentially connected by pipeline; Two or more than two side lower mouth of the hollow fiber ultrafiltration membrane (22) are connected into the outlet pipeline of the ultrafiltration membrane booster pump (21); The side lower mouth pipeline of the hollow fiber ultrafiltration membrane (22) is equipped with solenoid valve (a); Two or more than two side upper mouth of the hollow fiber ultrafiltration membrane (22) are connected into one end of the side upper mouth and connecting pipeline (23); The dry pipe of the side upper mouth and connecting pipeline (23) is equipped with solenoid valve (a); Two or more than two side lower mouth and upper mouth of the hollow fiber ultrafiltration membrane (22) are connected into the sewage and connecting pipeline (24), and the hollow fiber ultrafiltration membrane side lower mouth and the sewage and connecting pipeline (24) are communicated with the pipeline equipped with solenoid valve (a); The sewage pipe of the quartz sand filter (13), the sewage pipe of the activated carbon filter (14), the sewage pipe of the ion exchanger (15), the sewage and connecting pipeline (24) are connected into the inlet end of the sewage tank (25) together; The top inlet end of the finished water tank (4) is equipped with finished water tank pipeline (41); The liquid outlet pipeline of the chlorine dioxide generator (3) is equipped with metering pump (31); The liquid outlet pipeline end of the chlorine dioxide generator (3) is connected into the middle and rear section of the side upper mouth and connecting pipeline (23); The inlet end of the finished water tank pipeline (41) and the outlet end of the backwashing pipeline (5) are connected into the end of the side upper mouth and connecting pipeline (23); The finished water tank pipeline (41) is sequentially equipped with solenoid valve (a), flowmeter (c) and water mixing valve (42) from near to far along the connecting end of the side upper mouth and connecting pipeline (23); The backwashing pipeline (5) is sequentially equipped with backwashing booster pump (51), pressure sensor (b), flowmeter (c) and solenoid valve (a) from near to far along the outlet end; The pipeline of the water supply branch (6) is sequentially equipped with variable-frequency water supply pump group (61), ultraviolet filter (62), pressure sensor (b) and flowmeter (c) along water flow direction; The backwashing booster pump (51) and the variable-frequency water supply pump group (61) are connected into the outlet end of the finished water tank (4).

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