CN213885710U - Multipurpose ultra-filtration and nanofiltration double-membrane method energy-saving water treatment device - Google Patents
Multipurpose ultra-filtration and nanofiltration double-membrane method energy-saving water treatment device Download PDFInfo
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- CN213885710U CN213885710U CN202121589748.1U CN202121589748U CN213885710U CN 213885710 U CN213885710 U CN 213885710U CN 202121589748 U CN202121589748 U CN 202121589748U CN 213885710 U CN213885710 U CN 213885710U
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Abstract
The utility model discloses a multipurpose ultra-filtration and nanofiltration double-membrane energy-saving water treatment device, which comprises a raw water tank, wherein the raw water tank is communicated with a primary lift pump, the primary lift pump is communicated with an ultra-filtration membrane filter, the ultra-filtration membrane filter is communicated with a secondary lift pump, the secondary lift pump is communicated with a nanofiltration membrane filter, the nanofiltration membrane filter is communicated with a product water tank, a cross-flow concentrated water outlet of the nanofiltration membrane filter is communicated with the raw water tank and an energy storage compression tank, and the energy storage compression tank is communicated with a dosing tank through a water ejector; the water outlet of the energy storage compression tank is communicated with the ultrafiltration membrane filter through a backwashing pipeline of the ultrafiltration membrane filter, and a backwashing valve is arranged on the backwashing pipeline of the ultrafiltration membrane filter. The utility model discloses utilize and receive the pressure differential of straining and ultrafiltration to wash ultrafiltration membrane module, simultaneously, carry out effectual processing to receiving the dense hydrologic cycle of cross-flow of straining and carrying out in the former water pitcher, reduced raw water concentration, improved ultrafiltration membrane module's life, reduced the operation energy consumption.
Description
Technical Field
The utility model relates to the field of agricultural machinery, in particular to a multipurpose ultra-filtration and nanofiltration double-membrane energy-saving water treatment device.
Background
With the progress of science and technology society, the traditional water treatment process is difficult to improve the quality of effluent water and remove partial pollutants in the water. In order to ensure the safety of water consumption of people and improve the quality of water, the water treatment process is perfected in the recycling process of water, and high attention is paid to people by applying a new water treatment method. The ultrafiltration/nanofiltration double-membrane process is used as a new generation water treatment process, and has the characteristics of simple and efficient process, effective improvement of effluent quality and the like, so that the process is generally used nationwide.
Compared with the traditional feedwater treatment process, the ultrafiltration membrane technology has the following advantages: (1) the operating pressure of the ultrafiltration membrane component is 0.1 MPa, the pressure supply is simple, and the material cost of the equipment is relatively low. (2) The molecular weight cutoff is 20-150 kDa, and most organic pollutants can be effectively cut off. However, the ultrafiltration membrane technology has certain requirements on the quality of the inlet water, so that membrane-crossing resistance is increased due to the fact that membrane pollution is easily caused under the condition that the concentration of raw water pollutants is high, the operation energy consumption of the process is greatly increased, and the concentration of the raw water pollutants needs to be controlled.
Compared with a reverse osmosis device, the nanofiltration device has the advantages that the operation pressure is low, the modularization degree of the device is high, and filter membranes made of corresponding materials can be selected according to actual requirements. In addition, the nanofiltration membrane can effectively remove divalent ions in water and remove SO4 2- 、Mg2+And Ca2+The removal rate is up to more than 90 percent, and the hardness of water is effectively reduced. Aiming at the high requirement of the nanofiltration membrane technology on the quality of inlet water, the nanofiltration membrane is placed behind an ultrafiltration membrane device, so that the pollution of the nanofiltration membrane is reduced, and the service life of the nanofiltration membrane is prolonged. For the traditional nanofiltration process, concentrated water with higher pressure energy is usually selected to be directly discharged, thereby not only causing the waste of water resources, but also leading the pressure in the concentrated water to be higherCan not be effectively utilized.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a multipurpose ultra-filtration and nanofiltration double-membrane energy-saving water treatment device. The utility model overcomes the higher milipore filter subassembly energy consumption that leads to of raw water concentration is big, and the big problem of loss utilizes to receive to strain and rinses the milipore filter subassembly with the pressure differential of ultrafiltration, simultaneously, carries out effectual processing to receiving the dense hydrologic cycle of cross-flow of receiving to former water pitcher, has reduced raw water concentration, has improved the life of milipore filter subassembly, has reduced the operation energy consumption, but wide application in sewage treatment, normal water treatment and feedwater advanced treatment field.
The purpose of the utility model is realized through the following technical scheme:
a multi-purpose ultrafiltration and nanofiltration double-membrane energy-saving water treatment device comprises a raw water tank, wherein the raw water tank is communicated with a primary lift pump, the primary lift pump is communicated with an ultrafiltration membrane filter, the ultrafiltration membrane filter is communicated with a secondary lift pump, the secondary lift pump is communicated with a nanofiltration membrane filter, the nanofiltration membrane filter is communicated with a water production tank, a cross-flow concentrated water outlet of the nanofiltration membrane filter is communicated with the raw water tank and an energy storage compression tank, and the energy storage compression tank is communicated with a chemical feeding tank through a water injector; the water outlet of the energy storage compression tank is communicated with the ultrafiltration membrane filter through a backwashing pipeline of the ultrafiltration membrane filter, and a backwashing valve is arranged on the backwashing pipeline of the ultrafiltration membrane filter.
The improved water tank is characterized in that the raw water tank is communicated with a primary lift pump through a raw water inlet pipe, the primary lift pump is communicated with an ultrafiltration membrane filter through an ultrafiltration membrane filter water inlet pipeline, the ultrafiltration membrane filter is communicated with a secondary lift pump through an ultrafiltration membrane filter water outlet pipeline, and the secondary lift pump is communicated with a nanofiltration membrane filter through a nanofiltration membrane filter water inlet pipeline.
In a further improvement, pressure gauges are arranged on the water inlet pipeline of the ultrafiltration membrane filter and the water inlet pipeline of the nanofiltration membrane filter.
The cross-flow concentrated water outlet of the nanofiltration membrane filter is communicated with the energy storage compression tank through a communicating pipe, and a pressure stabilizing valve is arranged on the communicating pipe.
In a further improvement, the communicating pipe is provided with a check valve.
In a further improvement, a cross-flow concentrated water outlet of the nanofiltration membrane filter is communicated with a raw water tank through a cross-flow concentrated water circulating pipeline.
The beneficial effects of the utility model reside in that:
1. the utility model discloses a pipeline circulation will receive and strain the dense hydrologic cycle of cross-flow and utilize to the former water tank in to reach and reduce secondary pollution, and provide water pressure and reduce milipore filter running resistance and energy consumption, improve its life's purpose.
2. The utility model discloses a to receive and strain the washing that is used for milipore filter in concentrated hydrologic cycle of cross-flow to the compression jar, realize effectively utilizing and receive and strain the concentrated water pressure ability of cross-flow, reduce secondary pollution's purpose when reducing the energy consumption.
Drawings
The present invention is further explained by using the attached drawings, but the content in the attached drawings does not constitute any limitation to the present invention.
FIG. 1 is the overall structure diagram of the present invention
In the figure: the device comprises a raw water tank 1, a raw water inlet pipe 2, a primary lift pump 3, an ultrafiltration membrane filter inlet pipeline 4, an ultrafiltration membrane filter 5, an ultrafiltration membrane filter outlet pipeline 6, a secondary lift pump 7, a nanofiltration membrane filter inlet pipeline 8, a nanofiltration membrane filter 9, a nanofiltration membrane filtered water pipeline 10, a cross-flow concentrated water circulating pipeline 11, an energy storage compression tank 12, a pressure stabilizing valve 13, a dosing tank 14, a water ejector 15, a check valve 16, a water production tank 17 and an ultrafiltration membrane filter backwashing pipeline 18.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples.
Fig. 1 shows the structure diagram of the utility model, raw water is by raw water tank 1, through raw water inlet pipe 2, one-level elevator pump 3 and milipore filter inlet pipe 4, gets into milipore filter 5 and carries out holding back of macromolecular weight polluting substances and suspended substance. The effluent of the ultrafiltration membrane filter passes through an effluent pipeline 6 of the ultrafiltration membrane filter, a secondary lift pump 7 and a nanofiltration membrane filtration water inlet pipeline 8, and enters a nanofiltration membrane filter 9 for removing low molecular weight pollutants and suspended substances and intercepting divalent ions. The outlet water of the nanofiltration membrane filter enters a water production tank 17 through a nanofiltration membrane filter outlet pipe 10, and the nanofiltration component cross-flow concentrated water passes through a nanofiltration cross-flow concentrated water circulating pipe 11, part of the cross-flow concentrated water enters an energy storage compression tank 12, and part of the cross-flow concentrated water circulates to a raw water tank 1. When the ultrafiltration membrane filter is cleaned, the backwashing valve is opened, the water inlet valve of the compression tank is closed, and the backwashing pipeline 18 is backwashed through the ultrafiltration filtration unit.
The parameter conditions of the ultrafiltration membrane filter include, but are not limited to, this example. The filter membrane adopts flat-plate polyvinylidene fluoride, the molecular weight cutoff is 50 kDa, and the ultrafiltration pressure is 0.1 mPa. The flow ratio of the raw water to the outlet water of the ultrafiltration membrane filter is 1: 10.
The parameter conditions of the nanofiltration membrane filter include, but are not limited to, the present example. The filter membrane is a Tao's NF90 polyamide composite membrane, the molecular weight cut-off is 100 Da, and the ultrafiltration pressure is 0.8 mPa. The flow ratio of the outlet water of the ultrafiltration membrane filter to the outlet water of the nanofiltration membrane filter is 1: 10-20, and the flow ratio of the outlet water of the nanofiltration membrane filter to the flow of the concentrated water is 1:10 to 20. The nanofiltration cross-flow velocity was 0.5 m/s.
In this example, the pressure in the compression tank was controlled to be about 0.2 mPa.
The specific use flow is as follows:
firstly, raw water enters a primary pressure pump from a raw water tank through a water inlet pipeline, is subjected to ultrafiltration through an ultrafiltration membrane filter after being pressurized to 0.1 MPa, and the flow is kept stable by adjusting a valve of the water inlet pipeline. The outlet water of the ultrafiltration membrane is inlet water of the nanofiltration membrane component, namely concentrated water.
And secondly, boosting the pressure of the ultrafiltration water to 0.8mPa by a secondary pressure pump, and then enabling the ultrafiltration water to enter a nanofiltration membrane component, so as to ensure that the nanofiltration cross flow speed is about 0.5 m/s. The outlet water of the nanofiltration membrane unit is the outlet water of the device after the secondary advanced treatment.
And thirdly, part of high-pressure energy cross-flow concentrated water generated by the nanofiltration membrane filter enters a water inlet pipeline of the energy storage compression tank, and the pressure in the tank is controlled to be maintained at about 0.2 MPa through a pressure stabilizing valve.
And fourthly, part of high-pressure energy cross-flow concentrated water generated by the nanofiltration membrane filter circulates to the raw water tank, and the cross-flow concentrated water has high-pressure energy and high flow rate, so that a pressure pump system is not required to be used for providing power in the whole circulation pipeline, and the cross-flow concentrated water can be fully mixed with the raw water and dilute the concentration of solid pollutants in the raw water due to the high flow rate of the cross-flow concentrated water, and meanwhile, part of pressure is provided, the working power of a primary lifting pump 3 is reduced, and the wastewater of the nanofiltration membrane filter is reduced.
And fifthly, when the ultrafiltration membrane component is cleaned, closing a water inlet valve of the compression tank, opening a water outlet valve, and simultaneously mixing the medicament and backwashing water by using the water ejector to clean the ultrafiltration membrane.
The flow ratio of the raw water to the water discharged from the ultrafiltration membrane filter is 1:10, the flow ratio of the water discharged from the ultrafiltration membrane filter to the water discharged from the nanofiltration membrane filter is 1: 10-20, and the flow ratio of the water discharged from the nanofiltration membrane filter to the water discharged from the concentrated water is 1:10 to 20. Since SO is added into the raw water tank4 2- 、Mg2+And Ca2+Thus, ions in the cross-flow concentrated water of the nanofiltration membrane filter are continuously precipitated, and the precipitate is filtered at the ultrafiltration membrane filter.
It should be finally noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the protection scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (6)
1. A multipurpose energy-saving water treatment device adopting ultrafiltration and nanofiltration and a double-membrane method comprises a raw water tank (1), wherein the raw water tank (1) is communicated with a primary lifting pump (3), the primary lifting pump (3) is communicated with an ultrafiltration membrane filter (5), the ultrafiltration membrane filter (5) is communicated with a secondary lifting pump (7), the secondary lifting pump (7) is communicated with a nanofiltration membrane filter (9), and the nanofiltration membrane filter (9) is communicated with a water production tank (17), and is characterized in that a cross-flow concentrated water outlet of the nanofiltration membrane filter (9) is communicated with the raw water tank (1) and an energy storage compression tank (12), and the energy storage compression tank (12) is communicated with a chemical dosing tank (14) through a water ejector (15); the water outlet of the energy storage compression tank (12) is communicated with the ultrafiltration membrane filter (5) through an ultrafiltration membrane filter backwashing pipeline (18), and a backwashing valve is installed on the ultrafiltration membrane filter backwashing pipeline (18).
2. The multipurpose energy-saving water treatment device with ultrafiltration and nanofiltration membrane and double membrane processes as claimed in claim 1, wherein the raw water tank (1) is communicated with the primary lift pump (3) through the raw water inlet pipe (2), the primary lift pump (3) is communicated with the ultrafiltration membrane filter (5) through the ultrafiltration membrane filter inlet pipe (4), the ultrafiltration membrane filter (5) is communicated with the secondary lift pump (7) through the ultrafiltration membrane filter outlet pipe (6), and the secondary lift pump (7) is communicated with the nanofiltration membrane filter (9) through the nanofiltration membrane filtration inlet pipe (8).
3. The multipurpose energy-saving water treatment device with ultrafiltration and nanofiltration membranes as claimed in claim 2, wherein pressure gauges are installed on the ultrafiltration membrane filter inlet pipe (4) and the nanofiltration membrane filter inlet pipe (8).
4. The multipurpose energy-saving water treatment device with the ultrafiltration and nanofiltration membrane and the double membrane method as claimed in claim 1, wherein a cross-flow concentrated water outlet of the nanofiltration membrane filter (9) is communicated with an energy storage compression tank (12) through a communicating pipe, and a pressure stabilizing valve (13) is arranged on the communicating pipe.
5. The multipurpose energy-saving water treatment device with ultrafiltration and nanofiltration double-membrane method according to claim 4, wherein the communicating pipe is provided with a check valve (16).
6. The multipurpose energy-saving water treatment device with ultrafiltration and nanofiltration and double membrane method as claimed in claim 4, wherein the cross-flow concentrated water outlet of the nanofiltration membrane filter (9) is communicated with the raw water tank (1) through a cross-flow concentrated water circulating pipeline (11).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121589748.1U CN213885710U (en) | 2021-07-14 | 2021-07-14 | Multipurpose ultra-filtration and nanofiltration double-membrane method energy-saving water treatment device |
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| CN202121589748.1U CN213885710U (en) | 2021-07-14 | 2021-07-14 | Multipurpose ultra-filtration and nanofiltration double-membrane method energy-saving water treatment device |
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| CN213885710U true CN213885710U (en) | 2021-08-06 |
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