CN213433872U - Water-saving ultrafiltration system - Google Patents

Abstract

The utility model discloses a water-saving ultrafiltration system, which comprises a sedimentation tank connected with a water inlet pipeline, wherein the sedimentation tank is connected with a primary filter through a pipeline with a water supply pump, the outlet end of the primary filter is connected with the inlet end of an ultrafiltration membrane group through a pipeline, the produced water outlet of the ultrafiltration membrane group is connected with a produced water pipeline with a produced water valve, the other end of the produced water pipeline is also connected with a backwash water tank with a backwash water inlet valve of the backwash water tank, the produced water outlet of the ultrafiltration membrane group is positioned between the produced water valve and the backwash water inlet valve of the backwash water tank, the outlet of the backwash water tank is connected with a backwash pipeline with a backwash pump and a backwash water outlet valve of the backwash water tank, the backwash pipeline is connected with the produced water pipeline, the system also comprises a water drainage pipeline, one end of the water drainage pipeline is connected with the sedimentation tank, the other end of the sedimentation tank is connected with the forward-washing drainage pipeline and the backwash pipeline of the, and a forward washing drain valve and a backwashing drain valve are respectively arranged on the forward washing drain pipeline and the backwashing drain pipeline.

Description

Water-saving ultrafiltration system

Technical Field

The utility model relates to an industrial water treatment field, especially a water-saving ultrafiltration system.

Background

Ultrafiltration is a membrane separation technique that can purify, separate, or concentrate a solution, and is widely used in water purification, sewage, concentration, and other applications, and a commonly used ultrafiltration membrane is a hollow fiber membrane. The ultrafiltration technology has the advantages of simple and convenient operation, low cost, no need of adding any chemical reagent, mild experimental conditions, no phase change compared with evaporation and freeze drying, and no change of temperature and pH, thereby preventing the denaturation, inactivation and autolysis of biological macromolecules. The ultrafiltration equipment has low energy consumption of the system and short production period, and compared with the traditional process equipment, the equipment has low operating cost, can effectively reduce the production cost and improve the economic benefit of enterprises. And in the ultrafiltration process, the intercepted impurities are continuously accumulated on the surface of the membrane, concentration polarization phenomenon can be generated, when the impurities on the surface of the membrane are accumulated to a certain concentration, the membrane holes can be blocked, the water permeability of the membrane is reduced, and at the moment, backwashing is needed to be carried out on the ultrafiltration membrane so as to remove the pollutants blocked on the membrane holes and the surface of the membrane. The recovery rate of the ultrafiltration membrane under the normal working condition is about 90 percent, about 10 percent of water is used for backwashing and other purposes, and the part of water needs to be directly discharged under the normal working condition, so certain waste is generated. There is therefore a need for a method or apparatus that addresses the above-mentioned problems.

Disclosure of Invention

The utility model provides a solve the above-mentioned not enough that prior art exists, provide a simple structure, design benefit, rationally distributed, directly utilize raw water and product water to carry out the recoil operation to reach the water-saving ultrafiltration system who saves the water resource purpose.

The technical solution of the utility model is that: a water-saving ultrafiltration system, characterized by: the system comprises a sedimentation tank 1 connected with a water inlet pipeline, the sedimentation tank 1 is connected with a primary filter 3 through a pipeline with a water supply pump 2, the outlet end of the primary filter 3 is connected with the inlet end of an ultrafiltration membrane group 4 through a pipeline, the water production outlet of the ultrafiltration membrane group 4 is connected with a water production pipeline 6 with a water production valve 5, the other end of the water production pipeline 6 is also communicated with a backwashing water tank 8 with a backwashing water tank inlet valve 7, the water production outlet of the ultrafiltration membrane group 4 is positioned between the water production valve 5 and the backwashing water tank inlet valve 7, the outlet of the backwashing water tank 8 is connected with a backwashing pipeline 11 with a backwashing pump 9 and a backwashing water tank outlet valve 10, the backwashing pipeline 11 is connected with the water production pipeline 6, the system further comprises a water discharge pipeline 12, one end of the water discharge pipeline 12 is connected with the sedimentation tank 1, the other end of the water discharge pipeline is connected with a forward washing water discharge pipeline 13 and a backwashing water discharge pipeline 14 of the ultrafiltration membrane group 4 in parallel connection, and a forward wash drain valve 15 and a backwash drain valve 16 are provided on the forward wash drain line 13 and the backwash drain line 14, respectively.

Compared with the prior art, the utility model, have following advantage:

the water-saving ultrafiltration system with the structure is simple in structure, ingenious in design and reasonable in layout, and aims at the problems existing in the use process of the traditional ultrafiltration system, the pipeline of the ultrafiltration system is redesigned and reasonably arranged, the backwashing water tank and the matched pipeline thereof are additionally arranged, part of produced water can be stored in the backwashing water tank during normal work, the ultrafiltration membrane is backwashed by using the part of the produced water when needed, and the water body containing impurities after flushing can be returned to the sedimentation tank again for sedimentation treatment. The ultrafiltration system can not only finish the conventional water body purification work, but also realize the backwashing of the ultrafiltration membrane on the premise of saving water sources, thereby saving a large amount of cost for operation enterprises. And the manufacturing process is simple, the manufacturing cost is low, so that the novel LED lamp has multiple advantages, is particularly suitable for popularization and application in the field, and has a very wide market prospect.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed Description

The following description will explain embodiments of the present invention with reference to the drawings. As shown in fig. 1: a water-saving ultrafiltration system comprises a sedimentation tank 1 connected with a water inlet pipeline, wherein the sedimentation tank 1 is connected with a primary filter 3 through a pipeline with a water feed pump 2, the outlet end of the primary filter 3 is connected with the inlet end of an ultrafiltration membrane group 4 through a pipeline, the produced water outlet of the ultrafiltration membrane group 4 is connected with a produced water pipeline 6 with a produced water valve 5, the other end of the produced water pipeline 6 is also communicated with a backwash water tank 8 with a backwash water tank inlet valve 7, the produced water outlet of the ultrafiltration membrane group 4 is positioned between the produced water valve 5 and the backwash water tank inlet valve 7, the outlet of the backwash water tank 8 is connected with a backwash pipeline 11 with a backwash pump 9 and a backwash water outlet valve 10 of the backwash water tank 10, the backwash pipeline 11 is connected with the produced water pipeline 6, the system also comprises a water discharge pipeline 12, one end of the water discharge pipeline 12 is connected with the sedimentation tank 1, the other end is connected with a forward washing water discharge pipeline 13 and a backwashing water discharge pipeline 14 of the ultrafiltration membrane module 4 in parallel, and a forward washing water discharge valve 15 and a backwashing water discharge valve 16 are respectively arranged on the forward washing water discharge pipeline 13 and the backwashing water discharge pipeline 14.

The utility model discloses water-saving ultrafiltration system's of embodiment working process as follows: the water body to be filtered firstly enters a sedimentation tank 1 for sedimentation treatment, after standing for a period of time, impurities in the water body are deposited on the bottom layer, relatively clean water body on the upper layer is sent to a primary filter 3 by a water supply pump 2, the primary filter 3 can carry out primary filtration on larger particle impurities in the water body, the water body after primary filtration finally enters an ultrafiltration membrane group 4, and purification is realized under the action of an ultrafiltration membrane; the purified produced water is directly conveyed to a container for collecting the produced water through a water production pipeline 6;

in the process, the water production valve 5 on the water production pipeline 6 is closed, the water inlet valve 7 of the backwashing water tank is opened, and a part of produced water is introduced into the backwashing water tank 8 and is temporarily stored; after the backwashing water tank 8 is filled with water, the water inlet valve 7 of the backwashing water tank is closed, the water production valve 5 is opened again, and the system works normally;

after working for a period of time, the surface of the ultrafiltration membrane can continuously accumulate intercepted impurities, when the impurities are excessive, concentration polarization phenomenon can be generated, the water permeability of the ultrafiltration membrane is reduced, and backwashing operation is needed at the moment;

when the ultrafiltration membrane needs to be backwashed, firstly closing the water production valve 5, opening the outlet valve 10 of the backwashing water tank and the backwashing drain valve 16, starting the backwashing pump 9, reversely inputting the water stored in the backwashing water tank 8 into the ultrafiltration membrane group 4 through the backwashing pipeline 11, reversely washing off impurities attached to the ultrafiltration membrane, and finally returning the impurities together with the backwashing water to the sedimentation tank 1 through the backwashing drain pipeline 14 and the drain pipeline 12;

after the backwashing is finished, closing the water outlet valve 10 of the backwashing water tank and the backwashing drain valve 16, opening the forward washing drain valve 15, and performing forward washing on the ultrafiltration membrane by using the pressure provided by the water supply pump 2, wherein part of impurities can finally return to the sedimentation tank 1 again through the forward washing drain pipeline 13 and the drain pipeline 12 along with the forward washing water body;

after the backwashing and forward washing operations are all finished, the forward washing drain valve 15 is closed, the water production valve 5 is restarted, the system returns to the working state again, and the water body in the sedimentation tank 1 can be filtered.

Claims (1)

1. A water-saving ultrafiltration system, characterized by: the system comprises a sedimentation tank (1) connected with a water inlet pipeline, wherein the sedimentation tank (1) is connected with a primary filter (3) through a pipeline with a water feed pump (2), the outlet end of the primary filter (3) is connected with the inlet end of an ultrafiltration membrane group (4) through a pipeline, the water production outlet of the ultrafiltration membrane group (4) is connected with a water production pipeline (6) with a water production valve (5), the other end of the water production pipeline (6) is also communicated with a backwash water tank (8) with a backwash water tank water inlet valve (7), the water production outlet of the ultrafiltration membrane group (4) is positioned between the water production valve (5) and the backwash water tank water inlet valve (7), the outlet of the backwash water tank (8) is connected with a backwash pipeline (11) with a backwash pump (9) and a backwash water tank water outlet valve (10), and the backwash pipeline (11) is connected with the water production pipeline (6), the system also comprises a drainage pipeline (12), one end of the drainage pipeline (12) is connected with the sedimentation tank (1), the other end of the drainage pipeline is connected with a forward washing drainage pipeline (13) and a back washing drainage pipeline (14) of the ultrafiltration membrane group (4) in parallel, and a forward washing drainage valve (15) and a back washing drainage valve (16) are respectively arranged on the forward washing drainage pipeline (13) and the back washing drainage pipeline (14).

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